Awesome map is awesome, but it is sadly wildly inaccurate in places. The Thunder Speakers actually sit in the western gap on that map, the Snake River on that map is the Great River (linguistic drift turned the Snake to the Snycruv). In the map I need to update, the Spirit Channel is basically on the far western side of the territory labelled as the 'Thunder Speakers', their river is essentially useless within their own territory because it passes through very rough terrain and is unnavigable rapids all through the mountains, and does not flood in a sufficiently reliable manner to use for agriculture.